private static object Create <TNotifier, TProperty>(Expression <Func <TNotifier, TProperty> > propertyPath)
where TNotifier : class, INotifyPropertyChanged
{
var properties = PropertyPathParser.GetPath(propertyPath);
var errorBuilder = new StringBuilder();
var parts = new INotifyingGetter[properties.Count];
for (var i = 0; i < properties.Count; i++)
{
if (TryGetError(properties, i, out string errorMessage))
{
errorBuilder.Append(errorMessage);
errorBuilder.AppendLine();
}
if (errorBuilder.Length == 0)
{
var property = properties[i];
var item = Getter.GetOrCreate(property);
parts[i] = (INotifyingGetter)item;
}
}
if (errorBuilder.Length != 0)
{
return(errorBuilder.ToString());
}
return(new NotifyingPath <TNotifier, TProperty>(parts));
}
public void ThrowsOnNullProp()
{
// ReSharper disable once ObjectCreationAsStatement
var exception = Assert.Throws <ArgumentNullException>(() => Getter.GetOrCreate(null));
Assert.AreEqual("Value cannot be null.\r\nParameter name: property", exception.Message);
}
public void GetValueGenericStruct()
{
var source = new StructLevel {
Name = "meh"
};
var getter = (Getter <StructLevel, string>)Getter.GetOrCreate(typeof(StructLevel).GetProperty("Name"));
Assert.AreEqual("meh", getter.GetValue(source));
}
public void GetValueGenericStruct()
{
var source = new StructLevel {
Name = "meh"
};
var getter = (Getter <StructLevel, string>)Getter.GetOrCreate(typeof(StructLevel).GetProperty(nameof(StructLevel.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreEqual("meh", getter.GetValue(source));
}
public void GetValueGeneric()
{
var source = new Fake <int> {
Value = 1
};
var getter = Getter.GetOrCreate(typeof(Fake <int>).GetProperty(nameof(Fake <int> .Value), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreEqual(1, getter.GetValue(source));
var genericGetter = (Getter <Fake <int>, int>)getter;
Assert.AreEqual(1, genericGetter.GetValue(source));
}
public void GetValue()
{
var source = new Fake {
Name = "meh"
};
var getter = Getter.GetOrCreate(typeof(Fake).GetProperty(nameof(Fake.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreEqual("meh", getter.GetValue(source));
var genericGetter = (Getter <Fake, string>)getter;
Assert.AreEqual("meh", genericGetter.GetValue(source));
}
public void GetValue()
{
var source = new Fake {
Name = "meh"
};
var getter = Getter.GetOrCreate(typeof(Fake).GetProperty("Name"));
Assert.AreEqual("meh", getter.GetValue(source));
var genericGetter = (Getter <Fake, string>)getter;
Assert.AreEqual("meh", genericGetter.GetValue(source));
}
public void GetValueGeneric()
{
var source = new Fake <int> {
Value = 1
};
var getter = Getter.GetOrCreate(typeof(Fake <int>).GetProperty("Value"));
Assert.AreEqual(1, getter.GetValue(source));
var genericGetter = (Getter <Fake <int>, int>)getter;
Assert.AreEqual(1, genericGetter.GetValue(source));
}
public void ThrowsOnWriteOnly()
{
var propertyInfo = typeof(Fake).GetProperty("WriteOnly");
Assert.NotNull(propertyInfo);
//// ReSharper disable once ObjectCreationAsStatement
var exception = Assert.Throws <ArgumentException>(() => Getter.GetOrCreate(propertyInfo));
var expected = "Property cannot be write only.\r\n" +
"The property Gu.Reactive.Tests.Helpers.Fake.WriteOnly does not have a getter.\r\n" +
"Parameter name: property";
Assert.AreEqual(expected, exception.Message);
}
public void Caching()
{
var getter1 = Getter.GetOrCreate(typeof(Fake).GetProperty(nameof(Fake.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
var getter2 = Getter.GetOrCreate(typeof(Fake).GetProperty(nameof(Fake.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreSame(getter1, getter2);
var getter3 = Getter.GetOrCreate(typeof(Level).GetProperty(nameof(Level.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
var getter4 = Getter.GetOrCreate(typeof(Level).GetProperty(nameof(Level.Name), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreSame(getter3, getter4);
Assert.AreNotSame(getter1, getter3);
}
public void Caching()
{
var getter1 = Getter.GetOrCreate(typeof(Fake).GetProperty("Name"));
var getter2 = Getter.GetOrCreate(typeof(Fake).GetProperty("Name"));
Assert.AreSame(getter1, getter2);
var getter3 = Getter.GetOrCreate(typeof(Level).GetProperty("Name"));
var getter4 = Getter.GetOrCreate(typeof(Level).GetProperty("Name"));
Assert.AreSame(getter3, getter4);
Assert.AreNotSame(getter1, getter3);
}
public void GetValueGenerics()
{
var intFake = new Fake <int> {
Value = 1
};
var intgetter = Getter.GetOrCreate(typeof(Fake <int>).GetProperty(nameof(Fake <int> .Value), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreEqual(1, intgetter.GetValue(intFake));
var genericintGetter = (Getter <Fake <int>, int>)intgetter;
Assert.AreEqual(1, genericintGetter.GetValue(intFake));
var doubleFake = new Fake <double> {
Value = 1
};
var doublegetter = Getter.GetOrCreate(typeof(Fake <double>).GetProperty(nameof(Fake <double> .Value), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.AreEqual(1, doublegetter.GetValue(doubleFake));
var genericdoubleGetter = (Getter <Fake <double>, double>)doublegetter;
Assert.AreEqual(1, genericdoubleGetter.GetValue(doubleFake));
}
public void GetValueGenerics()
{
var intFake = new Fake <int> {
Value = 1
};
var intgetter = Getter.GetOrCreate(typeof(Fake <int>).GetProperty("Value"));
Assert.AreEqual(1, intgetter.GetValue(intFake));
var genericintGetter = (Getter <Fake <int>, int>)intgetter;
Assert.AreEqual(1, genericintGetter.GetValue(intFake));
var doubleFake = new Fake <double> {
Value = 1
};
var doublegetter = Getter.GetOrCreate(typeof(Fake <double>).GetProperty("Value"));
Assert.AreEqual(1, doublegetter.GetValue(doubleFake));
var genericdoubleGetter = (Getter <Fake <double>, double>)doublegetter;
Assert.AreEqual(1, genericdoubleGetter.GetValue(doubleFake));
}
public object GetterGetOrCreateProperty()
{
return(Getter.GetOrCreate(Property));
}
public void FakeIsTrue()
{
var pathProperty = Getter.GetOrCreate(typeof(Fake).GetProperty(nameof(Fake.IsTrue), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.IsInstanceOf <NotifyingGetter <Fake, bool> >(pathProperty);
}
public void FakeIsTrue()
{
var pathProperty = Getter.GetOrCreate(typeof(Fake).GetProperty(nameof(Fake.IsTrue)));
Assert.IsInstanceOf <NotifyingGetter <Fake, bool> >(pathProperty);
}
public void FakeOfIntNext()
{
var pathProperty = Getter.GetOrCreate(typeof(Fake <int>).GetProperty(nameof(Fake <int> .Next), BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly));
Assert.IsInstanceOf <NotifyingGetter <Fake <int>, Level <int> > >(pathProperty);
}
public void FakeOfIntNext()
{
var pathProperty = Getter.GetOrCreate(typeof(Fake <int>).GetProperty(nameof(Fake <int> .Next)));
Assert.IsInstanceOf <NotifyingGetter <Fake <int>, Level <int> > >(pathProperty);
}